Except what alternatives do we have? Yes, nuclear power can go wrong, but in a modern nuclear reactor (Read: Not this, but anything we build in the future) the worst case scenario is serious damage to the plant and some minor radiation leaks. Chernobyl is a literal impossibility with new plants.
But hey, nukes are bad, let's drop the tech - what else shall we use? Well, there's coal, oil, and gas - except while nuclear power does serious environmental damage in a worst case scenario, coal/oil/gas do serious environmental damage in regular use. So scratch that, they're crappy too. Let's take a look at the renewables sector - how about biomass? I mean, it's a pretty simple concept, and any emissions will be offset by growing more biomass. Perfect, we have our solution! Except you need somewhere to grow the biomass, and then you can't grow food. Electricity is nice, but we need food to live, so I guess biomass can't provide all of our energy. It can do some, but we need something else too.
Alright, people talk about wind, solar, and wave energy a lot, there must be a good reason. Well, I look outside and while it's sunny, it's not windy - if my power supply isn't consistent it's worthless, so scratch wind and solar. Wave power? Well, the tides are fairly consistent, but the output simply can't match a full plant. Still, it works. So we have some power coming from biomass, and some from tidal power, and... well, crap. We've run out of viable options. Let's revisit a few old ones, then. Coal/Oil/Gas have serious environmental issues, but they've worked well so far. Nuclear is the safest of the lot (4 people have died from nuclear accidents in the last 20 years, over 4000 in coal alone), cheap, and clean - so er, why did we discount that one again? Because in an unprecedented earthquake, followed by a large tsunami, on an old design nobody makes any more, there's a *partial* meltdown?
Any other plant in these circumstances would have fared much worse, and these reactors are old technology. It's not nuke fetishism, it's common sense.